Dual-lens camera system

ABSTRACT

A dual-lens camera system is provided, including a first lens driving module and a second lens driving module each including a lens holder for receiving a lens, at least one magnetic element, and a driving board. The driving board has at least one driving coil for acting with the magnetic element to generate an electromagnetic force to move the lens holder along a direction that is perpendicular to the optical axis of the lens. On two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged in different configurations.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priorities of U.S. ProvisionalApplication No. 62/328,790, filed on Apr. 28, 2016, and Taiwan PatentApplication No. 106111993, filed on Apr. 11, 2017, the entirety of whichare incorporated by reference herein.

BACKGROUND OF THE INVENTION Field of the Invention

The invention relates to a dual-lens camera system, and moreparticularly to a dual-lens camera system that can move lenses usingelectromagnetic force.

Description of the Related Art

In existing dual-lens camera systems, two lens driving modules areusually arranged close to each other, and as a result, magneticinterference between the magnets of the two lens driving modules islikely to occur, causing the focus speed and accuracy of the lenses(which can move with the movement of the movable parts in the lensdriving modules) to be adversely affected. Therefore, what is needed isa dual-lens camera system that can prevent the magnetic interferencebetween the two lens driving modules.

BRIEF SUMMARY OF THE INVENTION

In view of the aforementioned problems, an object of the invention is toprovide a dual-lens camera system that can reduce the magneticinterference generated by the magnetic elements of the two lens drivingmodules, thereby improving the focus speed and accuracy of the lenses inthe dual-lens camera system.

An embodiment of the invention provides a dual-lens camera system,including a first lens driving module and a second lens driving modulearranged in a long-axis direction. The first and second lens drivingmodules each include a lens holder, at least one magnetic element, and adriving board. The lens holder is configured to receive a lens. Thedriving board has at least one first driving coil which is configured toact with the magnetic element to generate an electromagnetic force tomove the lens holder along a direction that is perpendicular to theoptical axis of the lens. On two adjacent sides parallel to each otherof the first and second lens driving modules, the magnetic elements arearranged in different configurations.

In some embodiments, on the two adjacent sides parallel to each other ofthe first and second lens driving modules, the magnetic elements arearranged asymmetrically with respect to the central line between the twoadjacent sides.

In some embodiments, on the two adjacent sides parallel to each other ofthe first and second lens driving modules, the magnetic elements do notoverlap when viewed along the long axis direction.

In some embodiments, the magnetic element of the first lens drivingmodule has a strip or triangular structure.

In some embodiments, the first lens driving module further includes fourmagnetic elements respectively disposed at four corners of the firstlens driving module.

In some embodiments, the magnetic elements include at least onemultipole magnet.

In some embodiments, the magnetic element is not disposed on a firstside of the first lens driving module adjacent to the second lensdriving module.

In some embodiments, the first lens driving module further includes amagnet disposed on a second side opposite the first side. The width ofthe magnet is greater than the width of the magnetic element of thefirst lens driving module.

In some embodiments, the first lens driving module further includes aweight balancer disposed on the first side and corresponding to themagnet for maintaining the weight balance of the first lens drivingmodule.

In some embodiments, the magnetic pole direction of the magnetic elementof the first lens driving module is parallel to the optical axis of thelens.

In some embodiments, the first lens driving module further includes amagnet and a magnetic field sensing element. The magnet and the magneticfield sensing element are disposed on a first side of the first lensdriving module adjacent to the second lens driving module. The magneticfield sensing element learns the position offset amount of the magnet bydetecting the magnetic field variation of the magnet. The magnet and themagnetic field sensing element do not overlap when viewed along theoptical axis.

In some embodiments, the first lens driving module further includes twomagnetic field sensing elements. The magnet and the magnetic fieldsensing elements are disposed on the first side, and the magnet islocated between the magnetic field sensing elements.

In some embodiments, the dual-lens camera system further includes ashielding member. The shielding member includes a magnetic conductivematerial and covers at least one side of the magnetic element of thefirst lens driving module for reducing the magnetic interference betweenthe first and second lens driving modules.

In some embodiments, the shielding member further forms at least onerecess corresponding to the top surface of the lens holder of the firstlens driving module for preventing the lens holder from impacting theshielding member.

In some embodiments, on the two adjacent sides parallel to each other ofthe first and second lens driving modules, the magnetic elements havedifferent lengths.

In some embodiments, on the two adjacent sides parallel to each other ofthe first and second lens driving modules, the number of the magneticelements is different.

In some embodiments, on the two adjacent sides parallel to each other ofthe first and second lens driving modules, the magnetic elements havethe same length.

In some embodiments, on the two adjacent sides parallel to each other ofthe first and second lens driving modules, the number of the magneticelements is the same.

In some embodiments, the first and second lens driving modules eachfurther include a frame. The lens holder is disposed in the frame whichhas the magnetic element mounted thereon. The electromagnetic forcegenerated between the first driving coil and the magnetic element drivesthe frame and the lens holder therein along the direction that isperpendicular to the optical axis of the lens.

In some embodiments, the first and second lens driving modules eachfurther include a second driving coil disposed on the lens holder. Thesecond driving coil is configured to can act with the magnetic elementto generate an electromagnetic force to move the lens holder along theoptical axis with respect to the frame.

In order to illustrate the purposes, features, and advantages of theinvention, the preferred embodiments and drawings of the invention areshown in detail as follows.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention can be more fully understood by reading the subsequentdetailed description and examples with references made to theaccompanying drawings, wherein:

FIG. 1 is a schematic view of a dual-lens camera system in accordancewith an embodiment of the invention;

FIG. 2 is an exploded view of a lens driving module in FIG. 1;

FIG. 3 is a cross-sectional view take along the line A-A′ in FIG. 1;

FIG. 4 is a schematic plane view showing the configuration of themagnetic elements of a dual-lens camera system in accordance with anembodiment of the invention;

FIG. 5A is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention;

FIG. 5B is a schematic view showing the magnetic pole direction (N-S) ofthe magnetic element M1 in FIG. 5A;

FIG. 6 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention;

FIG. 7 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention;

FIG. 8 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention;

FIG. 9 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention;

FIG. 10 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention;

FIG. 11 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention;

FIG. 12 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention;

FIG. 13 is a schematic view showing that the outsides of the magneticelements of two lens driving modules are provided with shielding membersin accordance with another embodiment of the invention; and

FIG. 14 is a schematic view showing that each of the shielding membershas at least one recess in accordance with another embodiment of theinvention.

DETAILED DESCRIPTION OF THE INVENTION

The making and using of the embodiments of a dual-lens camera system arediscussed in detail below. It should be appreciated, however, that theembodiments provide many applicable inventive concepts that can beembodied in a wide variety of specific contexts. The specificembodiments discussed are merely illustrative of specific ways to makeand use the embodiments, and do not limit the scope of the disclosure.

Unless defined otherwise, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which this invention belongs. It should be appreciated thateach term, which is defined in a commonly used dictionary, should beinterpreted as having a meaning conforming to the relative skills andthe background or the context of the present disclosure, and should notbe interpreted in an idealized or overly formal manner unless definedotherwise.

Referring to FIGS. 1 to 3, wherein FIG. 1 is a schematic view of adual-lens camera system 1 in accordance with an embodiment of theinvention, FIG. 2 is an exploded view of a lens driving module 2 in FIG.1, and FIG. 3 is a cross-sectional view take along the line A-A′ inFIG. 1. In this embodiment, two lens driving modules 2 of the dual-lenscamera system 1 may be provided in handheld digital products such asmobile phones or tablet PCs and arranged side-by-side in a long-axisdirection (the X-axis direction). The two lens driving modules 2 are,for example, voice coil motors (VCM) having the same specification andequipped with an optical image stabilizer (OIS) function, but theinvention is not limited thereto. In some embodiments, the two lensdriving modules 2 of the dual-lens camera system 1 may also havedifferent specifications and be equipped with auto-focus (AF) and OISfunctions.

As shown in FIGS. 1 to 3, each lens driving module 2 in this embodimentincludes a top casing 10, a base 20, a lens holder 30, a driving coil40, a frame 50, four driving magnets 60 (magnetic elements), an upperspring 70, a lower spring 72, four suspension wires 74, a circuit board80, a driving board 90, and two magnetic field sensing elements 92.

The top casing 10 has a hollow structure. Also, the top casing 10 can becombined with the base 20 to form a housing F of the lens driving module2, wherein the top casing 10 constitutes a top wall 10A and foursidewalls 10B of the housing F, and the base 20 constitutes a bottomwall 20A of the housing F. In addition, a top casing opening 12 and abase opening 22 are respectively formed on the top casing 10 and thebase 20. The center of the top casing opening 12 is located on anoptical axis O (parallel to the Z-axis) of a lens (not shown). The baseopening 22 is also located on the optical axis O and faces an imagesensor (not shown) placed outside the lens driving module 2.Accordingly, the lens in the lens driving module 2 and the image sensorcan perform image focusing in the direction of the optical axis O.

The frame 50 has an opening 52 and four frame edges 50A respectivelycorresponding to the four sidewalls 10B of the housing F. In thisembodiment, the four driving magnets 60 are affixed to the four frameedges 50A. In some embodiments, the four driving magnets 60 may also beaffixed to four corners of the frame 50. The shape of the drivingmagnets 60 may be a long strip or a triangle.

The lens holder 30 has a hollow ring structure and a through hole 32.The through hole 32 forms a threaded structure (not shown) correspondingto another threaded structure on the outer peripheral surface of thelens, such that the lens can be locked in the through hole 32. Thedriving coil 40 (second driving coil) is wound around the outerperipheral surface of the lens holder 30.

In this embodiment, the lens holder 30 and the lens therein are movablydisposed in the frame 50. More specifically, the lens holder 30 issuspended in the center of the frame 50 by the upper spring 70 and thelower spring 72 made of a metal material. When a current is supplied tothe driving coil 40, the driving coil 40 can act with the magnetic fieldof the driving magnets 60 to generate an electromagnetic force to movethe lens holder 30 and the lens therein along the Z-axis (i.e. theoptical axis O) direction with respect to the frame 50. For example, thefour driving magnets 60 (magnetic elements) may comprise at least onemultipole magnet which is used to electromagnetically act with thedriving coil 40 to move the lens holder 30 and the lens along theoptical axis O so as to perform image focusing.

Moreover, the outer peripheral portions of the upper and lower springs70 and 72 are respectively connected to the upper and lower sides of theframe 50, and the inner peripheral portions of the upper and lowersprings 70 and 72 are respectively connected to the upper and lowersides of the lens holder 30, so that the lens holder 30 can be suspendedin the frame 50.

The circuit board 80, such as a flexible printed circuit board (FPC), isaffixed to the base 20 by adhesion, for example. In this embodiment, thecircuit board 80 is electrically connected to a driving unit (not shown)placed outside the lens driving module 2 to perform OIS and otherfunctions (such as AF function).

One end of the four suspension wires 74 is affixed to the circuit board80 and the other end is connected to the upper spring 70, so that thesuspension wire 74 can suspend the frame 50 and the lens holder 30therein in the housing F. The suspension wires 74 may comprise a metalmaterial.

The driving board 90m such as a printed circuit board, has four firstdriving coils (not shown) therein. The positions of the four firstdriving coils respectively correspond to the positions of the fourdriving magnets 60 (wherein the two first driving coils are parallel tothe X-axis direction and the other two first driving coils are parallelto the Y-axis direction). The driving board 90 is affixed to the circuitboard 80 by adhesion, for example.

It should be realized that the circuit board 80 is provided with wiring(not shown) for transmitting electrical signals to the driving coil 40and the first driving coils of the driving board 90. In someembodiments, the wiring on the circuit board 80 may be electricallyconnected to the driving coil 40 through the suspension wires 74 and theupper spring 70, thereby controlling the movement of the lens holder 30along the optical axis O.

In this embodiment, two magnetic field sensing elements 92 arerespectively mounted on two sides of the base 20 extending in the X-axisand Y-axis directions. The two magnetic field sensing elements 92 may beHall effect sensors, MR sensors, or Fluxgate sensors, and can be used tolearn the position offset amount of the frame 50 and the lens holder 30with respect to the base 20 in the X-axis and Y-axis directions bydetecting the magnetic field variation of the magnetic elements 60 onthe frame 50.

Furthermore, the circuit board 80 can generate electrical signals to betransmitted to the first driving coils of the driving board 90, and thefirst driving coils can act with the driving magnets 60 on the frame 50to generate an electromagnetic force to move the frame 50 and the lensholder 30 therein along a direction that is perpendicular to the opticalaxis O (parallel to the XY plane) to compensate for the position offsetdescribed above. As a result, the OIS function is achieved.

As shown in FIG. 3, since the position of the two lens driving modules 2in the dual-lens camera system 1 is very close, magnetic interferencebetween the two adjacent driving magnets 60 of the two lens drivingmodules 2 is likely to occur, causing the focus speed and accuracy ofthe lenses to be adversely affected.

FIG. 4 is a schematic plane view showing the configuration of themagnetic elements of a dual-lens camera system in accordance with anembodiment of the invention. For the sake of simplicity and clarity,this embodiment and the following embodiments illustrate only thehousings F and magnetic elements M of the two lens driving modules toshow their relative positions. As shown in FIG. 4, the magnetic elementsM (corresponding to the driving magnets 60 in FIGS. 2 and 3) in thedual-lens camera system have the same structure (for example, all arelong strip magnets). Moreover, the two adjacent magnetic elements M1 andM2 disposed in the two different housings F are arranged to besymmetrical with respect to a central line C between the two housings F.However, in order to reduce the magnetic interference between themagnetic elements M1 and M2 which are close to each other, the magneticelements M1 and M2 may be multipole magnets to overcome this problem,thereby ensuring the focus speed and accuracy of the lenses of thedual-lens camera system.

In addition, in the following embodiments, the adjacent magneticelements M1 and M2 corresponding to the two adjacent sides parallel toeach other of the two housings F (two lens driving modules) may also bearranged in different configurations so as to reduce the magneticinterference generated by the adjacent magnetic elements M1 and M2 ofthe two lens driving modules, thereby reducing the magnetic interferencebetween the two lens driving modules of the dual-lens camera system.

FIG. 5A is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention. In this embodiment, the magnetic elements M(including a magnetic element M2) of a second lens driving module on theright side of FIG. 5A all have the same structure (long strip magnets),and the magnetic elements M (including a magnetic element M1) of a firstlens driving module on the left side of FIG. 5A have differentstructural configuration. For example, the magnetic element M1 of thefirst lens driving module includes at least two short magnets (i.e.their length is less than the length of the other magnetic elements M)spaced from each other, as shown in FIG. 5A. Accordingly, on twoadjacent sides of the first and second lens driving modules, themagnetic elements M1 and M2 are arranged asymmetrically with respect toa central line C between the two adjacent sides.

With the above structural design shown in FIG. 5A, the magneticinterference generated by the adjacent magnetic elements M1 and M2 ofthe two lens driving modules can be reduced. Consequently, the magneticinterference between the two lens driving modules of the dual-lenscamera system is reduced. It should also be realized that, by providingthe magnetic field sensing elements 92 (see FIG. 2) on the base 20 torespectively detect the magnetic field variation of the two magneticelements M1, the position offset amount of the frame 50 with respect tothe base 20 in the X-axis and Y-axis directions can be known. Inaddition, as indicated by the arrow direction in FIG. 5B, since themagnetic pole direction (N-S) of the magnetic element M1 is parallel tothe optical axis O (Z-axis direction) of the lens in this embodiment,the magnetic interference generated by the magnetic element M1 and themagnetic element M2 of the second lens driving module can be reduced.Also, since the two magnetic elements M1 are separated by a distance andoffset from the center position of the magnetic element M2, the magneticinterference between the magnetic elements M1 and M2 can be reducedfurther.

FIG. 6 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention. As shown in FIG. 6, this embodiment isdifferent from the structural configuration of the magnetic elements M(including the magnetic element M2) in FIG. 5A. More specifically, themagnetic elements M1 and M2 of this embodiment are all short magnets(the length is less than the length of the other magnetic elements M),and the magnetic elements M1 and M2 are arranged in a staggered manner.Accordingly, on two adjacent sides of the two lens driving modules, themagnetic elements M1 and M2 are arranged asymmetrically with respect toa central line C between the two adjacent sides. For example, themagnetic elements M1 and M2 do not overlap when viewed along the X-axisdirection. In this embodiment, the magnetic elements M1 and M2 may havethe same length.

With the above structural design shown in FIG. 6, the magneticinterference generated by the adjacent magnetic elements M1 and M2 ofthe two lens driving modules can also be reduced. Consequently, themagnetic interference between the two lens driving modules of thedual-lens camera system is reduced, and the weight of the dual-lenscamera system is effectively reduced.

FIG. 7 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention. As shown in FIG. 7, this embodiment differsfrom the embodiment of FIG. 6 in that the number of the adjacentmagnetic elements M1 and M2 of the two lens driving modules are bothonly one, and the magnetic elements M1 and M2 are arranged in astaggered manner. Accordingly, on two adjacent sides of the two lensdriving modules, the magnetic elements M1 and M2 are arrangedasymmetrically with respect to a central line C between the two adjacentsides. Moreover, a larger distance D between the magnetic elements M1and M2 in the Y-axis direction also reduces the magnetic interferencetherebetween.

Although the number of the magnetic elements M1 or M2 is one or two inthe above embodiments, it may also be three or more. Alternatively, thenumber of the adjacent magnetic elements M1 and M2 of the two lensdriving modules may both be plural. In particular, the magnetic elementsM1 and M2 may be staggered or arranged asymmetrically to reduce magneticinterference therebetween.

FIG. 8 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention. In this embodiment, the magnetic elements M(including a magnetic element M2) of a second lens driving module on theright side of FIG. 8 all have a long strip structure, and the magneticelements M (including two magnetic element M1) of a first lens drivingmodule on the left side of FIG. 8 all have a triangular structure.

Moreover, the magnetic elements M (including the magnetic elements M1)of the first lens driving module are respectively located at fourcorners of the housing F, and the magnetic elements M (including themagnetic element M2) of the second lens driving module are respectivelylocated on four sides of the housing F. Accordingly, the adjacentmagnetic elements M1 and M2 of the two lens driving modules aresubstantially arranged in a staggered manner. In other words, on twoadjacent sides of the two lens driving modules, the magnetic elements M1and M2 are arranged asymmetrically with respect to a central line Cbetween the two adjacent sides. In this embodiment, the magneticelements M1 and M2 do not overlap when viewed along the X-axisdirection.

With the above structural design shown in FIG. 8, the magneticinterference generated by the adjacent magnetic elements M1 and M2 ofthe two lens driving modules can also be reduced. Consequently, themagnetic interference between the two lens driving modules of thedual-lens camera system is reduced.

FIG. 9 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention. In this embodiment, a second lens drivingmodule on the right side of FIG. 9 has four long strip magnetic elementsM (including a magnetic element M2) arranged symmetrically. On the otherhand, on a first side F1 (adjacent to the second lens driving module) ofa first lens driving module on the left side of FIG. 9, no magneticelement is provided to correspond to the magnetic element M2 of thesecond lens driving module. Thus, the magnetic interference between thetwo lens driving modules can be reduced.

However, in order to overcome the problem that the driving force isinsufficient due to the reduction of the magnetic element M in the firstlens driving module, the width, the volume, or the weight of themagnetic element M provided on a second side F2 of the first lensdriving module may be increased, as shown in FIG. 10, to enhance theoverall driving force of the first lens driving module. The magneticelement M disposed on the second side F2 may be a magnet, and the secondside F2 is opposite the first side F1.

In addition, in order to avoid the poor stability of the first lensdriving module on the left side of FIG. 10 caused by the weightimbalance, a non-magnetic conductive weight balancer W (see FIG. 11) mayalso be provided on the first side F1 of the first lens driving moduleto correspond to the magnetic element M on the second side F2, formaintaining the weight balance of the first lens driving module.

FIG. 12 is a schematic plane view showing the configuration of themagnetic elements of two lens driving modules in accordance with anotherembodiment of the invention. In this embodiment, a magnetic element M1(such as a magnet) and two magnetic field sensing elements 92 asdescribed above are provided on a first side F1 of the first lensdriving module on the left side of FIG. 12, and the magnetic element M1is adjacent to a magnetic element M2 of a second lens driving module onthe right side of FIG. 12. In particular, the length of the magneticelement M1 is less than that of the magnetic element M2, and themagnetic element M1 is located between the two magnetic field sensingelements 92. By reducing the length of the magnetic element M1 in thisembodiment, the magnetic interference between the magnetic elements M1and M2 is also reduced. In addition, the two magnetic field sensingelements 92 may be placed in the remaining space on the upper or lowerside of the magnetic element M1, so that the purpose of saving space anddevice miniaturization is further achieved.

In this embodiment, the magnetic field sensing elements 92 can be usedto detect the magnetic field variation of the magnetic element M1,thereby determining the position offset amount of the magnetic elementM1 and the frame 50 with respect to the base 20 (FIGS. 2 and 3).Moreover, the magnetic element M1 and the magnetic field sensingelements 92 do not overlap when viewed along the Z-axis (i.e. theoptical axis O in FIG. 2) direction. However, only a magnetic fieldsensing element 92 and a magnetic element M1 may be provided on thefirst side F1 in some embodiments. In this way, the position offsetamount of the magnetic element M1 and the frame 50 with respect to thebase 20 can also be learned by the magnetic field sensing element 92, toachieve the effect of saving space and device miniaturization.

FIG. 13 is a schematic view showing that the outsides of the magneticelements of two lens driving modules are provided with shielding membersin accordance with another embodiment of the invention. As shown in FIG.13, the outsides of the magnetic elements M (including the magneticelements M1 and M2) mounted on the movable parts (i.e. the frames 50 inFIGS. 2 and 3) of the two lens driving modules are respectively providedwith a shielding member S (this embodiment includes two shieldingmembers S). Each of the shielding members S includes multiple shieldingportions 51 and a frame portion S2 connecting the shielding portions 51.The shielding member S may be affixed to the frame 50 or integrallyformed with the frame 50. It should be realized that the shieldingmembers S comprise a magnetic conductive material (such as nickel-ironalloy), so that the shielding members S can guide and concentrate themagnetic lines generated by the magnetic elements M, thereby reducingthe magnetic interference between the adjacent magnetic elements M1 andM2 of the two lens driving modules of the dual-lens camera system.

Referring to FIG. 14, in some embodiments, the frame portions S2 of theshielding members S each further has at least one recess R that isformed on the top surface of the magnetic element M1 or M2 andcorresponding to the lens holder 30 (FIGS. 2 and 3) of the first orsecond lens driving module. When the lens holder 30 moves downward withrespect to the frame 50 along the Z-axis direction due to focusing orvibration, (the top surface of) the lens holder 30 can enter therecess(s) R and abut the top surface (stop surface) of the magneticelement M1 or M2, thereby preventing the lens holder 30 from impactingthe shielding member S and restricting the lens holder 30 on a limitposition. As a result, not only the moving distance of the lens holder30 in the Z-axis direction is increased, but the thickness of the firstand second lens driving modules in the Z-axis direction can beeffectively reduced and thus the purpose of device miniaturization isachieved.

Although the structural configuration of the magnetic elements M1 and M2shown in FIGS. 13 and 14 is similar to that of the embodiment in FIG.6A, the magnetic elements M1 and M2 may also be configured as show inFIGS. 5A and 7-12 or arranged in other optional configurations which canreduce the magnetic interference between the two lens driving modules,as long as the shielding portion S1 of the shielding member S can coverthe outside of the magnetic element M1 or M2. On the other hand, themagnetic pole direction (N-S) of the magnetic elements M1 and M2 in theforegoing embodiments may be parallel to the Z-axis direction (as shownin FIG. 5B), or the magnetic elements M1 and M2 may also be multipolemagnets, so that the magnetic interference between the magnetic elementsM1 and M2 can be reduced accordingly.

Although embodiments of the present disclosure and their advantages havebeen described in detail, it should be understood that various changes,substitutions and alterations can be made herein without departing fromthe spirit and scope of the disclosure as defined by the appendedclaims. For example, it will be readily understood by those skilled inthe art that many of the features, functions, processes, and materialsdescribed herein may be varied while remaining within the scope of thepresent disclosure. Moreover, the scope of the present application isnot intended to be limited to the particular embodiments of the process,machine, manufacture, composition of matter, means, methods and stepsdescribed in the specification. As one of ordinary skill in the art willreadily appreciate from the disclosure of the present disclosure,processes, machines, manufacture, compositions of matter, means,methods, or steps, presently existing or later to be developed, thatperform substantially the same function or achieve substantially thesame result as the corresponding embodiments described herein may beutilized according to the present disclosure. Accordingly, the appendedclaims are intended to include within their scope such processes,machines, manufacture, compositions of matter, means, methods, or steps.In addition, each claim constitutes a separate embodiment, and thecombination of various claims and embodiments are within the scope ofthe disclosure.

What is claimed is:
 1. A dual-lens camera system, comprising: a firstlens driving module; a second lens driving module, the first and secondlens driving modules being arranged in a long-axis direction and eachcomprising: a lens holder configured to receive a lens; at least onemagnetic element; and a driving board having at least one first drivingcoil, wherein the first driving coil is configured to act with themagnetic element to generate an electromagnetic force to move the lensholder along a direction that is perpendicular to an optical axis of thelens; wherein on two adjacent sides parallel to each other of the firstand second lens driving modules, the magnetic elements are arranged indifferent configurations.
 2. The dual-lens camera system as claimed inclaim 1, wherein on the two adjacent sides parallel to each other of thefirst and second lens driving modules, the magnetic elements arearranged asymmetrically with respect to a central line between the twoadjacent sides.
 3. The dual-lens camera system as claimed in claim 1,wherein on the two adjacent sides parallel to each other of the firstand second lens driving modules, the magnetic elements do not overlapwhen viewed along the long axis direction.
 4. The dual-lens camerasystem as claimed in claim 1, wherein the magnetic element of the firstlens driving module has a strip or triangular structure.
 5. Thedual-lens camera system as claimed in claim 1, wherein the first lensdriving module further comprises four magnetic elements respectivelydisposed at four corners of the first lens driving module.
 6. Thedual-lens camera system as claimed in claim 1, wherein the magneticelements comprise at least one multipole magnet.
 7. The dual-lens camerasystem as claimed in claim 1, wherein the magnetic element is notdisposed on a first side of the first lens driving module adjacent tothe second lens driving module.
 8. The dual-lens camera system asclaimed in claim 7, wherein the first lens driving module furthercomprises a magnet disposed on a second side opposite the first side,and the width of the magnet is greater than the width of the magneticelement of the first lens driving module.
 9. The dual-lens camera systemas claimed in claim 7, wherein the first lens driving module furthercomprises a weight balancer disposed on the first side and correspondingto the magnet for maintaining the weight balance of the first lensdriving module.
 10. The dual-lens camera system as claimed in claim 1,wherein the magnetic pole direction of the magnetic element of the firstlens driving module is parallel to the optical axis of the lens.
 11. Thedual-lens camera system as claimed in claim 1, wherein the first lensdriving module further comprises a magnet and a magnetic field sensingelement, the magnet and the magnetic field sensing element beingdisposed on a first side of the first lens driving module adjacent tothe second lens driving module, and the magnetic field sensing elementlearns the position offset amount of the magnet by detecting themagnetic field variation of the magnet, and the magnet and the magneticfield sensing element do not overlap when viewed along the optical axis.12. The dual-lens camera system as claimed in claim 11, wherein thefirst lens driving module further comprises two magnetic field sensingelements, the magnet and the magnetic field sensing elements beingdisposed on the first side, and the magnet is located between themagnetic field sensing elements.
 13. The dual-lens camera system asclaimed in claim 1, further comprising a shielding member comprising amagnetic conductive material and covering at least one side of themagnetic element of the first lens driving module for reducing themagnetic interference between the first and second lens driving modules.14. The dual-lens camera system as claimed in claim 1, wherein theshielding member further forms at least one recess corresponding to atop surface of the lens holder of the first lens driving module forpreventing the lens holder from impacting the shielding member.
 15. Thedual-lens camera system as claimed in claim 2, wherein on the twoadjacent sides parallel to each other of the first and second lensdriving modules, the magnetic elements have different lengths.
 16. Thedual-lens camera system as claimed in claim 15, wherein on the twoadjacent sides parallel to each other of the first and second lensdriving modules, the number of the magnetic elements is different. 17.The dual-lens camera system as claimed in claim 3, wherein on the twoadjacent sides parallel to each other of the first and second lensdriving modules, the magnetic elements have the same length.
 18. Thedual-lens camera system as claimed in claim 3, wherein on the twoadjacent sides parallel to each other of the first and second lensdriving modules, the number of the magnetic elements is the same. 19.The dual-lens camera system as claimed in claim 1, wherein the first andsecond lens driving modules each further comprise a frame, the lensholder being disposed in the frame which has the magnetic elementmounted thereon, and the electromagnetic force generated between thefirst driving coil and the magnetic element drives the frame and thelens holder therein along the direction that is perpendicular to theoptical axis of the lens.
 20. The dual-lens camera system as claimed inclaim 19, wherein the first and second lens driving modules each furthercomprise a second driving coil disposed on the lens holder, and thesecond driving coil is configured to can act with the magnetic elementto generate an electromagnetic force to move the lens holder along theoptical axis with respect to the frame.